chain coming off, pedalling backwards after groupset swap

dru
dru Posts: 1,341
edited June 2011 in Workshop
Hi people,

Have just swapped my bike over from campag to shimano drive train (please see below for full setup) and whilst I can get all the gears running the chainset in the correct direction, when in the 53/12 combination if I pedal backwards the chain falls off.

Can anyone shed any light on this for me please.

If I adjust the rear mech upwards to line up the chain so that the chain does not fall off it means that I can not actually shift into the 12 cog.

I didn't have this problem with the campagnolo setup and the chainset and bottom bracket has not changed (could it be incompatibility?)

Chainset/BB - Campagnolo Centaur 53/39 (9/10 speed)
Front mech - Shimano Ultegra 6600
Rear mech - Shimano Ultegra 6700
chain - Shimano Ultegra
Shifters - Shimano 10 speed bar end shifter
cassette - 12/25 SRAM 1050

Any advise greatfully received.

Thanks,

Dru.

Comments

  • Flamez
    Flamez Posts: 105
    Chain too big with a short rear cage?
    Condor World Series 2012
    Boardman Team 2011
  • desweller
    desweller Posts: 5,175
    Where does it fall off? And when you say that you can adjust the derailleur to stop it falling off, what part of it are you adjusting - limit screw or cable tension?
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    On Strava.{/url}
  • dru
    dru Posts: 1,341
    clarification based on first two comments.

    The chain comes off of the chainset at about 4 o'clock looking side on.

    With regards to the adjustment this is with the tensioner rather than the high stop.

    Hope this helps.
  • stoobydale
    stoobydale Posts: 535
    I didn't have this problem with the campagnolo setup

    Enough said? :lol:


    Sorry, couldn't help it.
  • desweller
    desweller Posts: 5,175
    Have you tried setting it with the limit screw?
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    On Strava.{/url}

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